This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 15 |
| 3 | 105 |
| 4 | 436 |
| 5 | 1367 |
| 6 | 3539 |
| 7 | 8033 |
| 8 | 16475 |
| 9 | 31275 |
| 10 | 55748 |
| 11 | 94425 |
| 12 | 153192 |
| 13 | 239691 |
| 14 | 363446 |
| 15 | 536375 |
| 16 | 772909 |
| 17 | 1090592 |
| 18 | 1510201 |
| 19 | 2056462 |
| 20 | 2758123 |
| 21 | 3648814 |
| 22 | 4767088 |
| 23 | 6157387 |
| 24 | 7870067 |
| 25 | 9962502 |
| 26 | 12499033 |
| 27 | 15552247 |
| 28 | 19202869 |
| 29 | 23541165 |
| 30 | 28666799 |
| 31 | 34690401 |
| 32 | 41733315 |